与年龄相关的视觉工作记忆衰退的神经生理基础的分解
Marius Tröndle1, Nicolas Langer1
1Department of Psychology, University of Zurich, Methods of Plasticity Research, Zurich, Switzerland; University Research Priority Program (URPP) Dynamic of Healthy Aging, Zurich, Switzerland.
Neurobiology of aging
|April 9, 2024
概括
老年人显示阿尔法功率侧面化减少,影响视觉工作记忆 (VWM) 优先级. 神经活动的这种下降与较差的VWM性能相关,与逆侧延迟活动 (CDA) 不同.
科学领域:
- 神经科学是一个神经科学.
- 认知心理学 认知心理学
- 衰老研究研究 衰老研究
背景情况:
- 与年龄相关的工作记忆的下降是一个重大的社会问题.
- 之前关于逆侧延迟活性 (CDA) 的研究表明,在视觉工作记忆 (VWM) 中,其在不同年龄组中的稳定性.
- 任务诱导的α功率横向化已与与年龄相关的VWM下降有关,但由于信号混,其精确的关系和有效性仍在争论中.
研究的目的:
- 调查阿尔法功率横向化和与年龄相关的VWM性能下降之间的关系.
- 在关于衰老和认知的脑电图 (EEG) 研究中解决混因素,特别是无周期信号.
- 为了比较阿尔法功率横向化与CDA的年龄相关的神经变化.
主要方法:
- 在134名参与者身上利用脑电图 (EEG) 来测量神经活动.
- 应用信号处理技术来调整EEG数据中的无周期信号偏差.
- 分析了与不同年龄组VWM表现相关的任务诱导的α功率横向化和逆侧延迟活动 (CDA).
主要成果:
- 在对非周期性信号偏差进行校正后,复制了与年龄相关的α功率横向化下降.
- 只有在对非周期性信号混进行纠正后,才建立了VWM任务性能和α功率横向化之间的显著联系.
- 在不同年龄组观察到稳定的逆侧延迟活性 (CDA) 幅度,表明维维维的维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维维.
结论:
- 与年龄相关的VWM下降可能源于优先考虑相关信息的能力受损,反映在减少的α功率横向化.
- 这些发现强调了在EEG研究老化中考虑信号偏差的重要性.
- CDA的稳定性表明,不同的神经机制支持VWM编码或早期维护,这些神经机制不受衰老的影响.
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